JPS6322818B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has a floor suction port of a vacuum cleaner, in particular, a switching device that selectively moves the floor brush up and down according to the condition of the floor to be cleaned. In addition, in order to improve the switching operability of this switching device, foot-operated switching operating bodies are provided at left and right positions on the upper surface of the main body of the suction port.

[Conventional technology]

Conventionally, there was a connecting body for connecting the respective switching operation bodies placed on the left and right sides, a cam body for moving the floor brush up and down, and an articulated motion for giving switching motion and stabilizing the position of the cam body. The structure is complicated due to the need for additional parts, and a large load is applied due to foot operation, so in order to withstand this,
Problems arise, such as the necessity of making the parts of the switching device relatively large. (Refer to US Pat. No. 3,821,831) [Problems to be Solved by the Invention] Therefore, in view of the above problems, the present invention provides a sliding cam body that selectively switches the vertical position of the floor brush, and a top surface of the suction main body. It is an object of the present invention to provide a floor suction port which can be easily operated and is stable in the switching position, in a device having a foot-operable switching operation body for operating the sliding cam bodies arranged at the left and right positions of the floor. It is said that

[Means for solving problems]

The present invention provides a floor suction port for a vacuum cleaner, which is equipped with a floor brush that can be used by selectively moving it up and down, and in which a joint is provided on a case body equipped with the floor brush so as to be freely rotatable in the vertical direction. Small running wheels are arranged at the front left and right corners of the case body, and switching operation bodies for moving the floor brush in and out are installed on both sides of the joint of the case body so as to be able to move in and out of the upper surface of the case body. A bearing rib is integrally provided on the case body behind this switching operation body, and a large wheel is pivotally supported on an axle that is supported at both ends by the bearing rib, and the large wheel is mounted on the upper surface side of the case body of the bearing rib. In addition, the distance between the switching operation body and the large wheel is set to a distance that allows simultaneous operation of switching the floor brush and blocking the rotation of the large wheel with one foot.

[Effect]

Next, to explain the operation of the embodiment of the present invention, FIG. 1 shows a state in which the floor brush 12 is in the upper position, that is, the upper holding parts 41 and 41' of the sliding cam body 18 are in the upper position.
The floor brush 12 resists the pressing force of the coil spring 26.
This figure shows a state in which the protrusions 40, 40' provided on the brush stand 13 are being pushed upward. From this state, if the switching operation body 17 is pushed down in the direction of the arrow P in FIG. 1 by foot operation, the sliding cam body 18 is moved by the piece 51 in the direction of the arrow Q shown in FIG. And at this time, protrusion 4
0 and 40' slide down the inclined portions 43 and 43' of the sliding cam body 18 due to the pressing force of the coil spring and its own weight, and thus the floor brush 12 is switched to the lower position. On the other hand, due to the movement of the sliding cam body 18, the piece 50 of the right switching operation body 16 also moves in the direction of arrow Q, and the right switching operation body 16 is rotated in the direction of arrow S, as shown by the dotted line in FIG. The situation is as follows. From this state, if the right switching operation body 16 is pushed down in the opposite manner to the above, the state returns to the state shown in FIG. 1.

Since the right switching operation body 16 and the left switching operation body 17 are respectively arranged on the axis of the large wheel 28, when operating the switching operation body with the foot, the large wheel 28 is pressed down as shown in FIG. You can temporarily fix the floor suction port.

Due to the above switching operation, a relatively large compressive load is applied to the connecting portion of the sliding cam body 18, but since the connecting portion 39 has a substantially U-shaped cross section,
It does not easily deform or warp due to the compressive load. Moreover, the shaft body 47,
Openings 48, 48' are provided in the lower bottom surface of 47'.
By providing 8', the strength against compressive load does not particularly deteriorate. Furthermore, the cam portions 44, 44' are inevitably formed with notches 56, etc., which cause weakening of the strength against compressive loads.
Since the sliding cam body 18 is placed outside the connecting portion 39 where a relatively large compressive load is applied, sufficient strength can be ensured in the sliding cam body 18 without providing any special reinforcing body or the like.

Moreover, the parts 50 and 51 of the switching operation body are connected to the connecting part 39.
Because it is sandwiched between the side walls 46, 46' of
The longitudinal position of the sliding cam body 18 is not affected by dimensional errors of the upper case body 1 or the lower case body 2, and the relative position of the right switching operation body 16 and the left switching operation body 17 is always stable, so
This ensures reliable operation at all times.

Next, a method of assembling the switching portion will be explained using FIG. 8.

In the figure, 57 is an assembly stand.

First, as shown in the figure, the switching operation body right 16, the switching operation body left 17, the air passage structure 10, and the coil spring 2.
6. Attach the floor brush 12 etc. to the upper case body 1. Then, the sliding cam body 18 is attached as shown by the arrow T in the figure. At this time, since openings 48, 48' are provided in the bottom surface 49 of the connecting portion 39 of the sliding cam body 18, the pieces 50, 51 and the shaft bodies 47, 47'
Since the alignment can be visually confirmed, alignment can be easily performed. In addition, pieces 50, 51
However, since the sliding cam body 18 is sandwiched between the side walls 46, 46' of the connecting portion 39, the sliding cam body 18 is securely held, and problems such as falling off during the next assembly process will not occur.

As described above, the floor suction port according to the present invention has a solid sliding cam body, is easy to assemble, and has the right switching operation body 16, the left switching operation body 17, and the sliding cam body 18.
The relative positions of the connecting parts 3 and 3 are reliably determined, and stable operation can be obtained.
9, the cam parts 44, 44', and the spring parts 45, 45' for articulation are each provided integrally, so the number of parts is small and the structure is simple.

In addition, a right switching operation body 16 and a left switching operation body 17 are provided on the left and right positions of the upper surface of the mouthpiece body, respectively, so that the switching operation body 16 and the left switching operation body 17 can be operated independently by foot, so the user can perform switching operations while standing. At the same time, since the switching operation bodies are separated, there will be no inconveniences such as incorrect operation or one switching operation body becoming stuck.

〔Example〕

The structure of the present invention for achieving the above object will be explained with reference to embodiments. 1 is an upper case body;
A lower case body 2 is fixed to the upper case body 1 with screws 3 or the like. 4 is a dust suction port provided in the lower case body 2, and suction grooves 5 are provided on the left and right sides thereof. Reference numeral 6 denotes a shield made of a soft and highly elastic material such as rubber or soft vinyl chloride, and is arranged before and after the suction groove 5. Note that this shield 6 is provided for the purpose of increasing the flow velocity of the air flow flowing into the suction groove 5 and improving the suction performance. 7 is moved vertically by the upper case body 1 and the lower case body 2 (R shown in FIG. 3).
(in the direction of the arrow) A rotatably held joint; 8 is a bent pipe rotatably attached to the rear of the joint 7, and is connected to an extension pipe, etc. (not shown) from the main body of the vacuum cleaner. . Reference numeral 9 denotes a retaining body for preventing the joint 7 and the bent pipe 8 from coming off. 10
is an air passage structure for forming an air passage from the dust suction port 4 to the joint 7. 11 is a protective bumper made of a soft material such as rubber or soft vinyl chloride. Reference numeral 12 denotes a floor brush, which has a brush body 14 flocked to a brush stand 13 made of synthetic resin or the like, and is attached to a brush attachment groove 15 integrally provided in the lower case body 2 so as to be vertically movable. It is.

Reference numerals 16 and 17 denote a right switching operation body and a left switching operation body for operating the sliding cam body 18 for selectively moving the floor brush 12 up and down.

19 is a shaft provided integrally with the switching operation body right 16 and the switching operation body left 17, and 21 is
It is a load receiving part that is similarly provided integrally with the switching operation body right 16 and the switching operation body left 17, and the shaft 19 is connected to the upper bearing parts 23 and 2 that are integrally provided on the upper case body 1.
3, and the lower bearing part 24 provided integrally with the lower case body 2, and the load receiving part 21 is connected to the lower case body 2.
They are each rotatably held by a support portion 25 that is integrally provided in the. 26 is the floor brush 1
This is a coil spring that constantly presses down. 27 is a small wheel for running provided at the front left and right corners of the mouthpiece body; 28 is the switching operation body right 16;
and a large wheel for traveling provided at the rear near the left side 17 of the switching operation body.

The large wheel 28 is composed of a wheel portion 29 made of hard synthetic resin, and a tire portion 30 disposed around the outer circumference of the wheel portion 29 and made of a soft material such as rubber or soft synthetic resin. be. 31
is a notch-shaped opening for attaching the large wheel 28. 32 is an axle for rotatably supporting the bearing portion 33 of the large wheel 28;
Bearing rib A34, bearing rib B provided integrally with
35, and a bearing rib C36 and a bearing rib D37 that are integrally provided on the lower case body 2.

The sliding cam body 18 has a connecting part 39 located in the center thereof, protrusions 40, 40' provided on the left and right outer positions thereof, and provided integrally with the brush stand 13 of the floor brush 12 at the upper position. and inclined parts 43, 43' provided between the upper holding parts 41, 41' for holding the projecting pieces 40, 40' and the lower holding parts 42, 42' for holding the projecting pieces 40, 40' in the lower positions. It is composed of cam portions 44, 44', and spring portions 45, 45' provided at both left and right ends. The connecting portion 39 has a cross-sectional shape that is substantially U-shaped with an upward opening.
At both left and right ends, side walls 46, 4 having a U-shaped cross section are provided.
6' are connected, and shaft bodies 47, 47' are provided by integral molding.

Reference numerals 48 and 48' are openings provided in the bottom surface 49 of the connecting portion, and are located below the shaft bodies 47 and 47'. Numerals 50 and 51 are legs for operating the sliding cam body 18 which are provided integrally with the right switching operation body 16 and the left switching operation body 17, respectively, and grooves for inserting the shaft bodies 47 and 47'. 52 and 53, respectively.
54 and 54' are gentle mountain-shaped protrusions provided at the ends of the spring parts 45 and 45', respectively;
Reference numerals 5 and 55' denote protrusions that are integrally provided on the lower case body 2 in correspondence with these protrusions 54 and 54'. Note that these spring portions 45, 45', mountain-like protrusions 54, 54', and protrusions 55, 55' provide articulated movement in the switching operation, and the sliding cam body 18
This is provided to stabilize the position so that it does not move accidentally due to external shocks, etc.

Then, as shown in FIGS. 4 and 7, the right switching operation body 16 and the left switching operation body 17 are connected to the large wheel 2, respectively.
8 on the axis.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

(1) In the floor suction port of a vacuum cleaner that is used by selectively moving the floor brush up and down, a projecting piece is provided on the wall of the brush stand that fixes the floor brush, and a dogleg is installed on the upper case body on both sides of the joint. Since two switching operation bodies of the shape of the shape are slidably inserted, it is easy to select the vertical movement of the floor brush and the operation can be performed accurately.

(2) Since the switching operation body and the large wheel are arranged on the same axis, when operating the switching operation body with your foot, you must press the large wheel at the same time with your foot, which makes it difficult to temporarily fix the floor suction port. It has the effect of being very convenient to operate.

(3) A sliding cam body is provided with two protruding shaft bodies that engage with the pieces housed in the case of each switching operation body, and the sliding cam body has the protruding pieces slidably disposed on the sliding cam body. Since the sliding cam body is made to slide in either the left or right direction by forming a contacting inclined surface and operating a part protruding from the upper case body of the switching operation body, the vacuum cleaner can be moved. When operating it, you can see at a glance whether the brush is coming out of the suction mouth or inside it, and there are two switching controls on the left and right sides of the top of the mouthpiece body that can be operated independently by foot. The user can perform the switching operation while standing, and since the switching operating bodies are separated from each other at this time, there are no inconveniences such as operation errors or one switching operating body becoming stuck.

(4) Furthermore, since the projecting piece on the wall of the brush stand slides into contact with the inclined surface and moves up and down, thereby selectively moving the floor brush up and down, the operability is good, and the switching position It is possible to obtain a floor suction port for a vacuum cleaner that is stable and capable of reliable switching operations.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line _X1 - _X1 of FIG. 4, and FIG. 3 is a vertical sectional view.
4 and 5 are a plan view and a bottom view of one embodiment, FIG. 6 is a cross-sectional view along X ₂ -X ₂ of FIG.
The figure is an explanatory diagram of the operating method, and FIG. 8 is an explanatory diagram of the assembly method. 1... Upper case body, 2... Lower case body, 12...
...Floor brush, 16, 17...Switching operation body, 18...
...Sliding cam body, 19...Shaft, 21...Load receiving part, 39...Connecting part, 44, 44'...Cam part,
45, 45'... Spring part, 47, 47'... Shaft body,
48, 48'...opening, 49...bottom, 50,5
1... Piece, 52, 53... Groove.

Claims (1)

[Claims] 1. In the floor suction port of a vacuum cleaner, which is equipped with a floor brush that can be used by selectively moving it up and down, and in which a joint is provided on the case body in which the floor brush is installed, so that the joint can freely rotate in the vertical direction, the case body small wheels for running are arranged at the front left and right corners of the case body, and a switching operation body for moving the floor brush in and out is installed on both sides of the joint of the case body so as to be able to freely protrude and retract from the upper surface of the case body, A bearing rib is integrally provided on the case body behind the switching operation body, a large wheel is supported on an axle supported at both ends by the bearing rib, and the large wheel is exposed on the upper surface side of the case body of the bearing rib. An electric vacuum cleaner characterized in that a depressed portion is provided, and the distance between the switching operation body and the large wheel is set to a distance that allows simultaneous operation of switching the floor brush and blocking rotation of the large wheel with one foot. Machine floor suction port.